linux-kernel - Re: [PATCH] PCI: Mark INTx masking support of Chelsio T310 10GbE NIC as broken

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Message-ID: <4FC374CD.5000509@web.de>
Date:	Mon, 28 May 2012 14:51:25 +0200
From:	Jan Kiszka <jan.kiszka@....de>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Alexey Kardashevskiy <aik@...abs.ru>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Gibson <david@...son.dropbear.id.au>,
	Alexander Graf <agraf@...e.de>, kvm <kvm@...r.kernel.org>
Subject: Re: [PATCH] PCI: Mark INTx masking support of Chelsio T310 10GbE
 NIC as broken

On 2012-05-28 14:39, Michael S. Tsirkin wrote:
> On Fri, May 25, 2012 at 11:02:13AM -0300, Jan Kiszka wrote:
>> According to Alexey, the T310 does not properly support INTx masking as
>> it fails to keep the PCI_STATUS_INTERRUPT bit updated once the interrupt
>> is masked. Mark this adapter as broken so that pci_intx_mask_supported
>> won't report it as compatible.
>>
>> Reported-by: Alexey Kardashevskiy <aik@...abs.ru>
>> Signed-off-by: Jan Kiszka <jan.kiszka@....de>
> 
> 
> Just a thought: would be nice to have a way to discover
> the quirk was activated. Add an attribute so that
> userspace can detect and report this properly to users?
> Or just log a warning message ...

pr_notice_once? A flag for userspace would be significantly more
complicated (and not PCI layer hands).

Jan


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